Last 7 days
Bookmark and Share    
Peer Reviewed
See detailLordose et/ou xyphose chez le porc : mise à l’épreuve de l’hypothèse héréditaire
Laitat, Martine ULg; Veillat, Emilie; Van Cauwenberge, Henry et al

Poster (2015, February)

Lordosis and/or kyphosis, also called ”dipped shoulder” or ”humpy‐back” is sporadically observed in growing pigs. This condition is characterized by a thoracic and/or lumbar spinal deformity ... [more ▼]

Lordosis and/or kyphosis, also called ”dipped shoulder” or ”humpy‐back” is sporadically observed in growing pigs. This condition is characterized by a thoracic and/or lumbar spinal deformity. Pathomorphologically, it may be comparable with Scheuermann’s kyphosis in man and so constitutes a spontaneous model for this humane kyphosis of the thoracic or thoracolumbar spine. In pigs, this condition may decrease the value of carcasses, making deboning efforts challenging. Three major and non‐exclusive hypotheses formulated to explain these back deformations are nutrition, intrauterine viral infection and inherited predisposition. The objective of the present study was to test the latter and, if possible, to identify a locus (some loci) associated with the affection. Forty‐eight pigs were included in this case‐control study. Based on a clinical examination and/or on a measure of the degree of spinal deformity, 25 pigs classified as affected were compared to 23 pigs considered as normal. A whole genome Single Nucleotide Polymorphism (SNP) analysis was performed using a 50,000 SNP array. DNA from forty‐seven samples (tail tissue or blood) was extracted while one sample was eliminated because of its poor quality. After applying quality controls, 40 pigs and 57,838 SNPs (on a total of 62,163) remained for further analysis. One SNP (ASGA0090747) located on Sus scrofa chromosome SSC8 crossed the genome‐wide significant threshold and is thus suspected of being associated with the lordosis and/or kyphosis phenotype. These results seem to confirm the hereditary hypothesis. Further investigations are however needed to confirm the suspected association. [less ▲]

Detailed reference viewed: 18 (3 ULg)
Full Text
Peer Reviewed
See detailEffect of iron nanoparticles synthesized by a sol-gel process on Rhodococcus erythropolis T902.1 for biphenyl degradation
Wannoussa, Wissal; Masy, Thibaut ULg; Lambert, Stéphanie ULg et al

in Journal of Water Resource and Protection (2015), 7

Nanoparticles (NPS) are considered as a new generation of compounds to improve environmental remediation and biological processes. The aim of this study is to investigate the effect of iron NPS ... [more ▼]

Nanoparticles (NPS) are considered as a new generation of compounds to improve environmental remediation and biological processes. The aim of this study is to investigate the effect of iron NPS encapsulated in porous silica (SiO2) on the biphenyl biodegradation by Rhodococcus erythropolis T902.1 (RT902.1). The iron NPS (major iron oxide FexOy form) were dispersed in the porosity of a SiO2 support synthesized by sol-gel process. These Fe/SiO2 NPS offer a stimulating effect on the biodegradation rate of biphenyl, an organic pollutant that is very stable and water-insoluble. This positive impact of NPS on the microbial biodegradation was found to be dependent on the NPS concentration ranging from 10−6 M to 10−4 M. After 18 days of incubation the cultures containing NPS at a concentration of 10−4 M of iron improved RT902.1 growth and degraded 35% more biphenyl than those without NPS (positive control) or with the sole SiO2 particles. Though the microorganism could not interact directly with the insoluble iron NPS, the results show that about 10% and 35% of the initial 10−4 M iron NPS encapsulated in the SiO2 matrix would be incorporated inside or adsorbed on the cell surface respectively and 35% would be released in the supernatant. These results suggest that RT902.1 would produce siderophore-like molecules to attract iron from the porous silica matrix. [less ▲]

Detailed reference viewed: 40 (20 ULg)
Full Text
See detailLes procédures secondaires sous l'empire du nouveau Règlement insolvabilité
Wautelet, Patrick ULg

Conference (2015, February)

Cette présentation tire le bilan d'une dizaine d'années d'application des dispositions du Règlement 1346/2000 relatives aux procédures secondaires et trace les contours du nouveau régime des procédures ... [more ▼]

Cette présentation tire le bilan d'une dizaine d'années d'application des dispositions du Règlement 1346/2000 relatives aux procédures secondaires et trace les contours du nouveau régime des procédures secondaires sous l'empire du Règlement révisé [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailEvaluation of Water Resources Quality in Sabodala Gold Mining Region and Its Surrounding Area (Senegal)
Mall, Ibrahima; Diaw, Moctar; Dieng, Ndeye Maguette ULg et al

in Journal of Water Resource and Protection (2015), 7(3), 247-263

Geochemical and Geostatistical tools were used to assess: 1) the chemical quality and, geochemical processes in crystalline rock aquifers in Sabodala (Eastern Senegal) and its surroundings and 2) the ... [more ▼]

Geochemical and Geostatistical tools were used to assess: 1) the chemical quality and, geochemical processes in crystalline rock aquifers in Sabodala (Eastern Senegal) and its surroundings and 2) the impact of mining activities on their quality. A total of 26 water samples collected at boreholes, dug wells and stream, were analyzed to determine major and trace elements concentration focused on elements that represent more threats on human health. Boxplots define chemical characteristics of water for each aquifer formation compared to surface waters. Geostatistical analysis show two sources of water mineralization with regard to major elements: a first natural source characterized by Ca-Mg-HCO3 water type from boreholes and unpolluted surface water and a second group characterized by polluted water by nitrates with Na-NO3-Cl type mainly observed in upper weathered aquifers. However, considering trace element, geostatistical analysis showed three water groups: water with very low trace element concentrations encountered in boreholes and unpolluted surface waters, and waters with relatively high trace element concentrations such as Al observed in areas affected by gold mining activities and finally, polluted waters by Ni, Co, Mn and Cr observed at Sabodala. Results show that in eastern Senegal well waters are vulnerable and often affected by pollution. [less ▲]

Detailed reference viewed: 19 (4 ULg)
Full Text
See detailScanning the genome for QTL affecting the recombination process in the male and female cattle germline
Kadri, Naveen Kumar ULg; Harland, Chad ULg; Coppieters, Wouter ULg et al

Poster (2015, February)

We herein study genetic recombination in three dairy cattle population from France, New-Zealand and The Netherlands. We apply a new phasing algorithm extracting familial information suited for large half ... [more ▼]

We herein study genetic recombination in three dairy cattle population from France, New-Zealand and The Netherlands. We apply a new phasing algorithm extracting familial information suited for large half-sib families to reconstruct haplotypes and detect cross-overs. The software is robust to genotyping errors and map errors (genome builts still contain errors for non-model organisms). We identify more than 2,000,000 cross-over events in sperm cells transmitted by 2942 sires to 94,049 offspring, and more than 500,000 cross-over events in oocytes transmitted by 10,943 cows to 23,850 offspring. The estimated number of cross-overs per gamete and its accuracy were influenced by the family structure (number of offsprings, parents and grand-parents genotyped). The average number of cross-overs in males (24.0) was larger than in females (21.8), even after correction for family structure. In males, recombination rates were higher closer to telomeres whereas in females, recombination rates dropped at both centromeres and telomeres (probably as a result of lower informativity). The heritability of the global recombination rate was close to 0.20 in males and to 0.10 in females and the genetic correlation was ~0.70, indicating that common genes are influencing both traits. Genome-wide association studies clearly confirmed QTL located close to REC8 and RNF212 in males. The QTL associated to REC8 was also detected in females and there was a positive correlation between QTL effects in males and females. The QTL associated to REC8 accounted for ~10% of the genetic variance in both males and females. [less ▲]

Detailed reference viewed: 14 (8 ULg)
Full Text
Peer Reviewed
See detailStandardisation of milk mid-infrared spectra from a European dairy network
Grelet, Clément ULg; Fernandez Pierna, Juan Antonio; Dardenne, Pierre et al

in Journal of Dairy Science (2015), 98

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailConsommation de pornographie à l’adolescence : quelles représentations de la sexualité et de la pornographie, pour quelle sexualité ?
Puglia, Rosa ULg; Glowacz, Fabienne ULg

in Neuropsychiatrie de l'Enfance et de l'Adolescence (2015)

Cette recherche, réalisée sur une population de 319 adolescents (150 filles et 169 garçons) âgés de 15 à 19 ans, présente deux grands objectifs. Premièrement, elle vise à évaluer l’impact de ... [more ▼]

Cette recherche, réalisée sur une population de 319 adolescents (150 filles et 169 garçons) âgés de 15 à 19 ans, présente deux grands objectifs. Premièrement, elle vise à évaluer l’impact de l’accessibilité et de la visualisation de la pornographie au niveau des représentations de ce média et de la sexualité. Deuxièmement, elle vise à évaluer l’influence de la consommation pornographique au niveau du développement psycho-sexuel des adolescents. Un protocole comprenant plusieurs dimensions telles que les relations sentimentales, la sexualité, la pornographie, et les représentations a été administré aux participants de manière groupale et anonyme. Il en ressort que les adolescents consommateurs de pornographie soulignent davantage les effets positifs associés à la pornographie, qu’ils reconnaissent une influence de ce média sur leur vie sexuelle et qu’ils adoptent des pratiques sexuelles plus diversifiées que celles de leurs pairs non-consommateurs. En revanche, consommateurs et non-consommateurs soulignent de manière identique les effets négatifs associés à ce média. Cette conscientisation des effets négatifs aurait un effet modérateur sur l’influence de la pornographie. Actuellement, la consommation de pornographie est un comportement expérimenté par une majorité d’adolescents ; elle pourrait s’inscrire dans un processus développemental adolescentaire et se comprendre comme une conduite exploratoire répondant à diverses fonctions dont la recherche de repères au niveau de la sexualité. [less ▲]

Detailed reference viewed: 38 (11 ULg)
Full Text
Peer Reviewed
See detailManagement and systemic treatment of clear cell metastatic renal cell carcinoma: BSMO expert panel recommendations
El Ali, Z; Van Brummelen, D; Wolter, P et al

in Belgian Journal of Medical Oncology [=BJMO] (2015), 9(1),

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailMultiplicity editing in long-range heteronuclear correlation NMR experiments: Application to natural products
Sauri, Josep; Sistare, E.; Frederich, Michel ULg et al

Poster (2015, February)

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
See detailLes états spatio-temporels d'existence et de présence
Hallot, Pierre ULg; Stewart, Kathleen; Billen, Roland ULg

in Revue Internationale de Géomatique = International Journal of Geomatics and Spatial Analysis (2015), 25(2), 173-196

This paper addresses a new approach to formalize the spatiotemporal relationships between geographical objects that do not exist or that are not present at the time of the analysis. We propose first an ... [more ▼]

This paper addresses a new approach to formalize the spatiotemporal relationships between geographical objects that do not exist or that are not present at the time of the analysis. We propose first an analysis of the spatiotemporal states of existence and presence for a geographical object. Then, we combine the spatiotemporal states to define a comprehensive set of life and motion configuration. The proposed model serves as formal basis to perform spatiotemporal queries by retrieving selected patterns in the life and motion configurations. The research is applied to the organization of a scientific conference, in doing so we are able to define the relationships that exist between an event located in space and time and mobiles objects evolving within the space, i.e. the conference participants. [less ▲]

Detailed reference viewed: 46 (11 ULg)
See detailConformational properties of helical foldamers under force
Willet, Nicolas ULg; Hinterdorfer, Peter; Lecommandoux, Sébastien et al

Conference (2015, February)

The aim of this study is to investigate the mechanochemical behavior of foldamers able to change their conformation is a stimuli-responsive way. Peptidic secondary structures were studied in detail by ... [more ▼]

The aim of this study is to investigate the mechanochemical behavior of foldamers able to change their conformation is a stimuli-responsive way. Peptidic secondary structures were studied in detail by atomic force microscopy (AFM) at the single-molecule level. Synthetic copolymers containing a polypeptide block were prepared by N-carboxyanhydride amino acid ring-opening polymerization. The polymer chains were grafted onto gold surfaces and their mechanochemical behavior was then studied by AFM single-molecule force spectroscopy (SMFS). The investigated polypeptide blocks were based on polyglutamate, which undergoes transitions from alpha-helix to random coil. This can be induced by external stimuli (pH, ionic strength, temperature) or simply by applying a force. The mechanically driven unfolding of the helical foldamer was characterized in detail. Stretching the folded peptide resulted in original features in the force-distance traces. Plateaus that are specific for the helical conformation were detected, quantified and discussed. Pulling-relaxing SMFS experiments were performed and led to a better understanding of the mechanically induced unfolding of an alpha-helix as a reversible phenomenon. [less ▲]

Peer Reviewed
See detailDépasser la situation : de la situation-limite à la personnalité borderline. Généalogie, critique et clinique d’un concept sartrien
Cormann, Grégory ULg; Englebert, Jérôme ULg

Conference (2015, January 31)

Nous souhaitons interroger ici le concept sartrien de situation à partir d’une double approche historique et psychopathologique qui semble en diagnostiquer la disparition tout aussi bien conceptuelle ... [more ▼]

Nous souhaitons interroger ici le concept sartrien de situation à partir d’une double approche historique et psychopathologique qui semble en diagnostiquer la disparition tout aussi bien conceptuelle qu’existentielle : la notion de situation, organisatrice de l’ontologie phénoménologique de Sartre et pivot de son engagement, semble s’être aujourd’hui désintégrée en tant que concept (voir ses usages pseudo-conceptuels dans les domaines de la pédagogie et du management), alors que ce qu’on appelle la « condition postmoderne », telle qu’elle s’exprime dans de nouvelles symptomatologies psychopathologiques, rend apparemment caduque, face à la fragmentation des repères de l’existence, l’exigence de penser en/la situation. Nous procèderons en trois temps. Nous ferons d’abord la généalogie du concept, dont l’application à la psyché humaine et à la représentation théâtrale de celle-ci remonte, selon Leo Spitzer, à la fin du 17ème siècle. Dans cette première section, nous insisterons en particulier sur le rapport que l’élaboration du concept de situation entretient, au début du 20ème siècle, avec l’émergence de la psychopathologie notamment chez Jaspers (« situation-limite ») et chez Minkowski (nous rappellerons à cet égard le rôle de Gabriel Marcel dans le champ philosophique français de l’entre-deux-guerres). Nous serons également attentifs à la critique méthodologique que le concept de situation permet d’adresser à la métapsychologie freudienne. Sur cette base, nous reprendrons ensuite les principales étapes chez Sartre de la prise en considération de l’homme en situation et des possibilités de dépassement de cette situation. Nous envisagerons successivement l’Esquisse d’une théorie des émotions, « Questions de méthode » et L’Idiot de la famille. Il conviendra certes de rappeler comment l’existentialisme, comme le situationnisme à sa façon, a cherché, dans le sillage du marxisme, à réaliser la philosophie et du coup à transformer le concept en vécu. Mais nous montrerons aussi, à rebours, comment l’œuvre sartrienne, confrontée aux exigences conjointes du marxisme et de la psychanalyse (cf. l’analyse des pressions familiales dans le Flaubert), a dû dépasser le cadre de la magie émotionnelle au sein duquel la notion de situation s’était d’abord élaborée. Au-delà de la « situation sartrienne » – et peut-être en la prolongeant –, la critique de Deleuze des dispositifs nous servira enfin, dans un troisième temps, de point de bascule vers la condition postmoderne et la fragmentation de la situation en tant que repère d’existence. Le sujet borderline – véritable éclat de la postmodernité – nous permettra ainsi de conclure en reprenant le propos psychopathologique maturé par l’évolution conceptuelle de la situation. Nous caractériserons l’existence borderline par une fragmentation du soi corrélée à une explosion, voire à un morcellement, des espaces de vie qui répondent à la nécessité ontologique d’une « ubiquité instantanée » dénuée de présence corporelle (comme le permettent les espaces virtuels « connectés »). [less ▲]

Detailed reference viewed: 44 (8 ULg)
Full Text
See detailDroit constitutionnel - Dossier de documentation (année 2014-2015)
Behrendt, Christian ULg

Learning material (2015)

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en 2e année de ... [more ▼]

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en 2e année de bachelier en droit et en 2e année de bachelier en science politique. [less ▲]

Detailed reference viewed: 930 (295 ULg)
Full Text
See detailActivités physiques, représentations et femmes
Cloes, Marc ULg

Conference (2015, January 31)

Il est admis internationalement que les filles et les femmes représentent un public à risque en matière de sédentarité. Cette conférence interactive vise à répondre à trois questions: (1) L’activité ... [more ▼]

Il est admis internationalement que les filles et les femmes représentent un public à risque en matière de sédentarité. Cette conférence interactive vise à répondre à trois questions: (1) L’activité physique, qu’est-ce que c’est? (2) A quoi ça sert? (3) Qu’est-ce qu’il faut faire, finalement? Au-delà de la volonté de faire vivre aux participants une expérience originale, les objectifs finaux de l'intervention consistent à permettre une prise de conscience et à proposer des pistes d’action. [less ▲]

Detailed reference viewed: 55 (2 ULg)
Full Text
Peer Reviewed
See detailLe rythme vidéoludique comme mouvement : "Second Sight" et la ritournelle
Dupont, Bruno ULg

in Interval(le)s (2015), 7

Dans cet article, Bruno Dupont part de la constatation que la notion de rythme est omnipré- sente dans les descriptions et analyses de jeux vidéo, sans pour autant qu'il ait été tenté jusqu'ici de ... [more ▼]

Dans cet article, Bruno Dupont part de la constatation que la notion de rythme est omnipré- sente dans les descriptions et analyses de jeux vidéo, sans pour autant qu'il ait été tenté jusqu'ici de développer un concept de rythme qui soit adapté à la recherche. Partant de l'article bien connu de Benveniste sur l'étymologie du rythmos, de même que de la conception nonbinaire du rythme chez Deleuze et Guattari, exposée dans le chapitre de Mille plateaux consacré à la ritournelle, l'auteur souhaite fournir les prolégomènes d'un tel concept. En guise de support à sa démonstration, il utilise le jeu Second Sight sur Playstation 2 (2004). Cette contribution souligne qu'une théorie du rythme suppose l'analyse des séquences de mouvements produites par l'interaction entre jeu et joueur, ainsi que de la gestion du temps qui en découle. Dans le cas de Second Sight, en raison de la double appartenance générique du jeu (action et aventure), deux séquences motrices hétérogènes se trouvent coordonnées au sein d'un seul et même jeu, de sorte que naît une zone de friction, – que Dupont décrit à la suite de Deleuze/Guattari comme „entre-deux“ – dans laquelle le rythme spécifique au jeu, mais également au genre, se réalise par l'échange permanent entre deux modes spatio-temporels. En conclusion, l'auteur propose une définition du rythme vidéoludique qui place la machine et le joueur dans un contexte d'interaction et de négociation dynamique. [less ▲]

Detailed reference viewed: 10 (2 ULg)
See detailL'anorexie chez l'adolescente au croisement de questionnements
Glowacz, Fabienne ULg

Scientific conference (2015, January 31)

Detailed reference viewed: 20 (2 ULg)
Full Text
See detailStudy of durability and the physico-mechanical properties of thermally modified wood
Ninane, Maxime; Jourez, Benoît ULg; Hebert, Jacques ULg

Poster (2015, January 30)

Heat-treated wood is a credible alternative for certain kinds of tropical timber. It is also an alternative for certain polluting wood preservatives. This study aims to determine the changes in physico ... [more ▼]

Heat-treated wood is a credible alternative for certain kinds of tropical timber. It is also an alternative for certain polluting wood preservatives. This study aims to determine the changes in physico-mechanical properties and durability of wood that is subjected to heat treatment. For this, we studied five species (oak, ash, natural beech and a variant known as steamed beech, poplar, Douglas-fir). For each species, we had fifteen reference samples and fifteen corresponding treated samples. The results show a decrease in the hygroscopicity and an increase in dimensional stability of heat-treated wood in relation to the degradation of hemicelluloses. The mechanical properties are influence variously, because heat-treated wood is stiffer but also more brittle. The modulus of elasticity increases slightly after treatment. Side hardness and compressive fracture of heat-treated wood may increase up to 30%. On the other hand, the modulus of rupture, the ability to slit and impact may decrease by 50%, 60% and 70%. The durability of heat-treated wood against wood-destroying fungi increases. However, within each species, the durability increase varies greatly. Additional tests conducted to understand this variability, suggests that the heat distribution is not homogeneous within the processing unit. Moreover, our work suggests that durability is related to the fixed carbon content and that this path would be interesting to explore in the future. [less ▲]

Detailed reference viewed: 23 (0 ULg)
Full Text
Peer Reviewed
See detailElicitation of the defence mechanisms at plant case of Cucumis melo
Ydjedd, Siham; Kati, D.E.; Fauconnier, Marie-Laure ULg

Poster (2015, January 30)

The judicious use of elicitors could reduce the amount of pesticide necessary to protect crops and preservation of the environment. This strategy frequently called "stimulation of natural defenses ... [more ▼]

The judicious use of elicitors could reduce the amount of pesticide necessary to protect crops and preservation of the environment. This strategy frequently called "stimulation of natural defenses" arouses more and more interest in the phytosanitary field. [less ▲]

Detailed reference viewed: 29 (5 ULg)
Full Text
Peer Reviewed
See detailInteractions of natural rhamnolpids produced by Pseudomonas aeruginosa with plant model membranes
Polo Lozano, Damien ULg; Nasir, Mehmet Nail ULg; Deleu, Magali ULg et al

Poster (2015, January 30)

It is well known that chemical pesticides have harmful effects on human health and environment. In this context, the interest for alternative products such as biopesticides is increasing. Among them ... [more ▼]

It is well known that chemical pesticides have harmful effects on human health and environment. In this context, the interest for alternative products such as biopesticides is increasing. Among them, elicitors act on the plants by inducing systemic resistance against diseases caused by fungal, viral, bacterial agents and insects. Rhamnolipids are surface active molecules produced mainly by various strains of the bacterium Pseudomonas aeruginosa. These secondary metabolites are composed of one to three fatty acids with various chain lengths linked through a glycosidic bond to one or two rhamnose moieties. The fatty acids are linked together through an ester bond. These molecules have shown several biological activities including plant defense stimulation. It has been suggested that this elicitor activity could be related to an interaction of rhamnolipids with the lipid bilayer of the plant plasma membrane (PPM) and lead to its destabilization, which can activate the plant defense signaling pathways. In this context, interactions of two rhamnolipids (Rha-C10-C10 and Rha-Rha-C10-C10) with biomimetic membranes of PPM such as Langmuir monolayers and multilayers were investigated using biophysical and in silico approaches. [less ▲]

Detailed reference viewed: 26 (3 ULg)